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pbmtoascii - convert a portable bitmap into ASCII graphics
pbmtoascii
[-1x2|-2x4] [pbmfile]
Reads a portable bitmap as input. Produces
a somewhat crude ASCII graphic as output.
Note that there is no asciitopbm
tool - this transformation is one-way.
The -1x2 and -2x4 flags give you
two alternate ways for the bits to get mapped to characters. With 1x2, the
default, each character represents a group of 1 bit across by 2 bits down.
With -2x4, each character represents 2 bits across by 4 bits down. With the
1x2 mode you can see the individual bits, so it's useful for previewing
small bitmaps on a non-graphics terminal. The 2x4 mode lets you display larger
bitmaps on a standard 80-column display, but it obscures bit-level details.
2x4 mode is also good for displaying graymaps - "pnmscale -width 158 | pgmnorm
| pgmtopbm -thresh" should give good results.
pbm(5)
Copyright
(C) 1988, 1992 by Jef Poskanzer.
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